Hi guys i'm a newbie to this forum. I was thinking about turboing my car it is the 351c 4v, it has a .609 and .613 cam, a torker intake and a 750 holley. i'm not sure on the compression ratio my guess would be 11 or 12 to 1. would this cause any prblems? how much boost could i run with my setup? Thanks in advance!

 

Packaging issues with the exhaust are a problem that would be kinda costly, and bulky to figure out. 11:1 is WAAAY to much compression, but only the 70 had the small chamber heads, a later set like 72-74 would work well. Yes a turbo doesnt have the same issues that a blower has, but getting it to work well isnt a bolt on and go deal. You will probably hurt a bunch of parts getting it figured out.

Some will say go with a Windsor. Well yeah you could do that, but if you already have the Cleveland and later open chamber heads a blow through supercharger would work well. That would allow you to have an inexpensive alternative for the exhaust with the Cleveland, since its already there. Or you can go with the roots type blower and a hole in the hood.

Clevelands only have 4 headbolts per cylinder so massive boost isnt a good idea. The bottom end isnt exactly weak, but it does have some high rpm issues, and a blower would remedy that pretty well. A blown engine will make more torque on the bottom end and not need to be reved as high to make good power.

Getting a turbo to work and learning the ins and outs of it with a Cleveland is something they have been doing in Austrailia. Check into what they have down there, since the engine was in production far longer down under than in the states.

Are you sure its a Cleveland? I only ask because quite a few people have a hard time telling them from anything else.. we get taht alot.. Post a pic of it anyway.. would love to see it.

 

oh yeah its a cleveland and it loves to rev 7k. if it makes any diff the cam is .608 and .633ex. so would a blower or a supercharger be easier to get to work?or i should say safer, cause i dont mind the fab work for both. i just really like turbos and was hoping to get 6-8psi out of one without internal changes as the motor is already together and the car is "basically" done.

 

You can get a P1SC on it pretty easy, getting the right turbo is something completely different. A P1SC would give you right around that psi. it all depends on your heads, do you run race gas in it and did the heads have adjustable valvetrain on them factory?

 

there wasnt a cleveland in 69, yours was put in later, what year 351 is that?

 

i know it aint origanal, but worked out good because that is the motor i wanted. i'm not sure on the year of the motor. i bought it as an ex-drag car and have made it back to a street machine. as far as valve train i dont know, right now it has crane roller rockers and double springs (about #350 closed and #750 open). hope i dont sound too stupid but what is a p1sc, supercharger i presume, but what brand and where?

 

compression that high with a turbo youll never be able to run pump gas thats if you get the timing right drop the compression to 9.5to1 you can run 15 psi easy if you can feed it enough fuel your better off rebuilding it and using efi carbs like to lean out on a turbo